Screw-driver.



A. F. KEPPELER.

SCREW DRIVER. APPLICATION man MAR. 30. 1915. RENEWED FEB. 1 1,238,300.

Patented Aug. 28, 1917.

5114 van to;

ADOLPI-I F. KEPPELER, 0F BUTTE, MONTANA.

SCREW-DRIVER.

Specification of Letters Patent. Patented Aug. 28, 1917.

Application filed March 30, 1915, Serial No. 18,041. Renewed February14, 1917. Serial No. 148,595.

To all whom it may concern:

Be it known that I, AnoLPH F. KEPPELER, a citizen of the United States,residing at Butte, in the county of Silver-bow and State of Montana,have invented certain new and useful Improvements in Screw-Drivers, ofwhich the following is a specification.

This invention relates to an improved screw driver and the principalobject of the invention is to provide a screw driver of the type inwhich a disk carrying the screw engaging teeth is rotatably mountedbetween bearings carried by the handle with improved means forreleasably holding the disk in an adjusted position.

Another object of the invention is to so construct this screw driverthat the disk may be easily moved to an adjusted position but may besecurely held in the adjusted position and thus prevented from slippingout of the desired position when in use.

Another object of the invention is to provide improved means formounting the disk and spring holding the disk engaging pin in its normalposition.

Another object of the invention is to provide a screw driver which is soconstructed that the same will be very simple 'in" construction and atthe same time strong and durable and not liable to easily get out oforder or need repair.

This invention is illustrated in the accompanying drawings, whereinFigure 1 is a View showing the improved screw driver in side elevationwith the disk in one position.

Fig. 2 is a view similar to Fig. 1 with the disk in an adjustedposition.

Fig. 3 is an enlarged view of the outer end portion of the screw driverwith the disk in the position shown in Fig. 1 and indicated in adjustedposition by dotted lines.

Fig. 4 is a view similar to Fig. 3 but taken at right angles thereto.

F 5 is a sectional view line 55 of Fig. 3.

Fig. 6 is a perspective view of the disk which is rotatably mountedbetween the bearings of the handle.

Fig. 7 is a perspective view of the outer end portion of the handle.

The handle 10 is provided with a neck 11 which terminates in a headhaving a slot 12 formed therein to provide the bearings 13 and 14.

The disk 15 is provided with a screw entaken along the gaging bit 16 andis provided with abutment flanges 17 extending beyond the side faces ofthe disk and carrying a second screw engaging bit 18. When the disk isin position the abutment flanges 17 will engage the abutment shoulders19 and 20 of the split head thus limiting the rotary movement of thedisk and preventing it from moving beyond the desired amount.

This disk 15 is rotatably mounted between the bearings 13 and 14 uponthe screw or pivot pin 21 which passes through the openings 22 and 23formed in the bearing 13 and disk 15 and has its reduced threaded endportion 2a screwed into the threaded opening 25 formed in the.bearing14. By having the threaded end portion of the screw reduced an abutmentshoulder is formed which engages the inner face of the bearing 14 andthus limits the extent to which the screw may pass through the bearingll thereby preventing the resilient disk 26 which forms a spring frombeing compressed beyond a desired amount. This disk 26 which is formedof resilient steel or other metal is engaged by the head 27 of the screw21 and since it is normally bowed as shown clearly in Figs. 2, at and 5it will apply pressure to the latch pin 28 slidably mounted in theopening 29 of the bearing 13. This latch pin 28 is provided with arounded inner end portion as shown in Fig. 5 and therefore although thelatch pin may be moved into the socket 29 of the disk 15 by the springdisk 26 to hold the disk in an adjusted position it may be forced out ofthe same to permit of adjustment of the disk by simply pressing upon thetooth 18 to rotate the disk.

When operating this screw driver the disk may be rotated to the positionshown in Fig. 1 so that the screw driver may be used in the ordinarymanner with the bit 18 engaging the screw. If it is desired to use thescrew driver for removing screws or tightening them where the screwcould not be conveniently reached if the disk were in the position shownin Fig. 1 the bit 18 will be pressed to rotate the disk and move thesame to the position shown in Fig. 2. l/Vhen in this position the eye ofthe screw can first be engaged by either the bit 16 or the bit 18 andthe screw partially turned and the eye then engaged by the second bitthus perl mitting the screw to be turned a short distance with eachoperation of the screw driver. Therefore the screw can be readilyinserted or removed with this screw driver when it could not be removedwith a screw driver in which the bit remained in the relative positionshown in Fig. 1. If desired the handle could be provided with a numberof disks 15 each provided with bits of various sizes and thicknesses andthe disks could be changed according to the size of the screws to beused.

What is claimed is 1. A screw driver comprising a handle provided at oneend with bearings positioned in spaced relation, one of the bearingshaving an unthreaded opening and the second with a tln'eaded opening, adisk positioned between said bearings and provided with a bit, a latchpin slidably carried by the bearing having the unthreaded opening forengaging the disk and releasably holding the same in an adjustedposition, a concaved resilient disk engaging said latch pin, and a pivotpin passing through said resilient disk and through the unthreadedopening of said bearing and through ,said bit to rotatably mount the bitand having its end portions threaded and passing through the threadedopening of the second bearing whereby the tension of said resilient diskmay be regulated by adjustment of said pivot pin.

A screw driver comprising a handle, bearings positioned at one end ofsaid handle in spaced relation and cut away at one side to provideabutment shoulders at the junction of the handle and bearings and at apoint about the circumference of the bearings, a disk rotatably mountedbetweensaid bearings and provided with side flanges extending tooverhang the hearings to engage the abutment shoulders and limit therotary movement of the disk, a bit extending across the outer faces ofsaid flanges transversely of the disk, a bit extending from the oppositeside portion of said disk at right angles to said first mentioned bit,and means for releasably holding said disk in an adjusted position.

In testimony whereof I afiiX my signature in presence of two witnesses.

ADOLPH F. KEPPELER.

Witnesses J. F. LINDLAND, H. E. KNOX.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

